31 Where Are Its Eyes?-Mid

Where Are Its Eyes? FOCUS Question Why do different animals have eyes in different places?

它的眼睛在哪里?为什么不同的动物眼睛长在不同的地方?

A Good View Animals use their eyes to see. Some animals have eyes on the sides of their head. Some animals have eyes on the front of their head. Other animals have eyes that are not on their head at all! The location of animals eyes lets them see the world in different ways.

动物用眼睛看东西。 有些动物的眼睛长在头的两侧。 有些动物的眼睛长在头的前面。 其他动物的眼睛根本就不在头上!动物眼睛的位置让它们以不同的方式看世界。

Eyes on the Side Animals with an eye on each side of their head can see to the front. They can see to the side. They can even see behind them! These animals don't have to turn their head to be safe. They can see danger on all sides! Wowser A zebra can see a lion almost directly behind it without turning its head.

两侧有眼睛的动物头部两侧各有一只眼睛，可以看到前方。 他们能看到侧面。他们甚至可以看到他们身后!这些动物不需要转头来保证安全。 他们能看到四面八方的危险!斑马不用转头就能看到几乎正对着它后面的狮子。

Using Two Eyes Together Eyes on the front of the head are closer together. Each eye sees a view that is a bit different. The brain puts the views together to make one picture. Seeing one picture shows the animal how far away something is, or its distance. It also shows depth. Depth is how long something is from front to back.

两只眼睛在一起使用头前面的眼睛靠得更近。 每只眼睛看到的景象都有点不同。 大脑把不同的观点组合在一起，形成一幅图片。 看一张图片，动物可以看到某物有多远，或者它的距离。 它也显示了深度。深度是指某物从前到后的长度。

Seeing the Whole Picture Having two eyes in front also lets animals see through things. At least it seems that way. Is the view from one eye blocked? The brain uses what the other eye sees and fills in the rest. The animal sees the whole picture. This helps lions see zebras through tall grass. Sneaky! Try This Hold a finger right in front of your eyes. The finger only blocks one eye. It looks as though you can see through your finger.

在前面有两只眼睛也能让动物看透事物。 至少看起来是这样。 一只眼睛的视线被挡住了吗? 大脑使用另一只眼睛看到的东西，并填充其余的东西。 动物看到了整个画面。 这有助于狮子透过高高的草丛看到斑马。 卑鄙的!把一根手指放在眼睛前面。 手指只能挡住一只眼睛。 看起来你可以通过手指看到东西。

Eyes on Stalks Some animals have eyes that stick out from their head. The eyes are on eyestalks. An eyestalk is like a finger with an eye at the tip. It can move to see all around. Snails have eyestalks. They can protect their eyes by pulling each one into the shell!

有些动物的眼睛从头上伸出来。 眼睛在眼梗上。 眼柄就像指尖上有一只眼睛的手指。 它可以移动，看到周围的一切。 蜗牛有眼柄。它们可以把每一个都拉进壳里来保护眼睛!